21mm Setting Ring Form C Hardened Gauge Steel DIN 2250, DIN 286 JS3 - Metav IndustryLine

Combining hardened, lapped gauge steel with compliance to DIN 2250 / DIN 286 and a JS 3 tolerance, this setting ring delivers a stable, traceable reference for workshop inspection and setup tasks. Order the ring directly via Metav Werkzeuge or request application-specific advice from our consultants.

Metav IndustryLine Setting Ring 21 mm (Ring Gauge) — hardened, lapped gauge steel, JS 3

The Setting Ring 21 mm is a precision ring gauge designed for dimensional checking and calibration tasks in workshop metrology and quality control.

• Hardened, lapped gauge steel
• Conforms to DIN 2250 and DIN 286
• JS 3 tolerance for reproducible fits
• Nominal diameter Ø 21 mm

Accurate conformity for dependable gauging

Made from hardened, lapped gauge steel, this ring gauge ensures a consistent seating surface that resists wear and delivers repeatable results over many inspection cycles. Conformance to DIN 2250 and DIN 286 with a JS 3 tolerance provides a verified engineering baseline, making the gauge suitable as a reference component in both workshop checks and incoming inspection. The compact nominal diameter of 21 mm is ideal for small-bore checks and setting operations where a stable datum reduces setup time and measurement variance.

Designed for repeatability and workflow efficiency

The Form C configuration and lapped finish reduce variation caused by contact conditions, so the gauge functions as a traceable reference for go/no-go or comparative measurements. In practice, this means fewer adjustments at the machine, faster throughput at the inspection bench and clearer pass/fail decisions when used alongside comparators or micrometers. The robust construction and standardised tolerance class support integration into documented quality processes, which contributes to predictable inspection intervals and simplified process control.

Practical handling, storage and application guidance

The ring gauge is intended for routine use on toolroom benches, calibration rigs and quality-control stations. The lapped contact faces require careful handling to preserve surface integrity; avoid impacts and store in a clean, dry environment to maintain calibration stability. When used as a reference for setting or checking, the gauge assists in aligning measuring instruments and establishing repeatable assembly interfaces, thereby reducing rework and non-conformances in production runs.

For application advice or to purchase Metav IndustryLine setting rings, contact Metav Werkzeuge for personalised guidance and prompt delivery from Emmerich: info@metav-werkzeuge.com · +49 2822 7131930

Technical data

• Article number: M313.021
• GTIN: 4054469120591
• ECLASS: 21170104
• Manufacturer: Metav IndustryLine

Facts

• Nominal diameter: 21 mm
• Standards: DIN 2250; DIN 286
• Tolerance class: JS 3
• Tariff number: 90173000

Special features

• Material: hardened and lapped gauge steel
• Form: Form C
• Use: precision gauging and calibration
• Finish: lapped contact faces

FAQ

What is the nominal diameter of the gauge?
The nominal diameter is 21 mm for the Metav IndustryLine Setting Ring (SKU M313.021).

Which standards and tolerances apply to this ring gauge?
The ring conforms to DIN 2250 and DIN 286 and is manufactured to a JS 3 tolerance class for consistent fits.

What material and surface finish does the gauge have?
The gauge is made from hardened, lapped gauge steel, providing wear resistance and a smooth contact surface.

Where is this ring gauge best used?
This ring is suitable for workshop metrology, calibration benches and incoming inspection as a reference for setting and go/no-go checks.

How should the ring gauge be stored to maintain accuracy?
Store the ring in a clean, dry place and avoid knocks; preserving the lapped surfaces helps retain long-term reproducibility.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com